Salts of triazine derivatives with oxygenated acids of phosphorus

ABSTRACT

This invention relates to salts of triazine derivatives with oxygenated acids of phoshporus, having general formula (I):   &lt;IMAGE&gt;   obtained by salification, with an acid containing phosphorus, of polycondensates of 2,4,6-triamino-1,3,5-triazine. The compounds having the general formula (I) are particularly used as flame-resistant additives.

FIELD OF THE INVENTION

The present invention relates to salts of triazine derivatives with oxygenated acids of phosphorus. More specifically the present invention relates to salts of triazine derivatives with oxygenated acids of phosphorus and their use in the preparation of self-extinguishing polymeric compositions based on thermoplastic polymers or on polymers having elastomeric properties, particularly olefinic polymers or copolymers.

BACKGROUND OF THE INVENTION

Various solutions are known in the art for reducing or eliminating the combustion of polymers. Some of these solutions are based on the use of metals derivatives, especially antimony, bismuth or arsenic, combined with partially halogenated and thermically unstable organic compounds such as paraffinic chlorinated waxes. Other solutions are based on the use of substances capable of producing intumescence. The formulations of products using such substances are generally constituted of the polymer and at least three main additives: one essentially phosphorated, the aim of which is to give, in combustion, an impermeable semisolid glassy layer consisting essentially of polyphosphoric acid and to activate the intumescence process; a second additive containing nitrogen which acts as a foaming agent, and a third additive containing carbon, which provides the carbon necessary for forming a char layer between the polymer and the flame.

Examples of such formulations are those referred to in the following patents: U.S. Pat. No. 3,810,862 (Phillips Petroleum Co.) based on melamine, pentaeritritol and ammonium polyphosphate, U.S. Pat. No. 4,727,102 (Vamp S.r.l.) based on melamine cyanurate a hydroxyalkyl derivative of isocyanuric acid, and ammonium polyphosphate; and in the published patent application WO 85/05626 (Plascoat U.K. Ltd) based on various phosphorus and nitrogen derivatives, including, in particular, a combination of melamine phosphate, pentaerythritol and ammonium polyphosphate. In more recent formulations, an organic compound containing nitrogen, generally an aminoplastic resin obtained by the condensation of urea, melamine or dicyandiamide with formaldehyde, has been used together with an organic or inorganic phosphorous derivative. Examples of formulations with two additives are referred to in patents U.S. Pat. No. 4,504,610 (Montedison Spa) based on oligomeric derivatives of 1,3,5-triazine and ammonium polyphosphate, and EP 14,463 (Montedison Spa), based on organic compounds chosen among benzylguanamine and reaction products of aldehydes and various cyclic nitrogen-substituted compounds, in particular benzylguanamine and formaldehyde copolymers, and of ammonium polyphosphate. It is also possible to obtain self-extinguishing compositions by using mono component additives, containing both nitrogen and phosphorus in the organic molecule as described in U.S. Pat. No. 4,201,705 (Borg-Warner Corp.)

These flame-retardant, intumescent systems give the polymer in which they are contained the property of forming a carbon residue following combustion or contact with a flame. The flame-retardant systems of this kind show numerous advantages: non-corrosion of the machinery used to process the polymers, lower smoke emission compared to systems containing metal derivatives and halogenated hydrocarbons and, above all, the possibility of giving the polymers satisfactory flame-retardant properties using a lower quantity of additive, consequently avoiding a high decrease in the mechanical properties of the polymers.

The Applicant has now discovered that high flame-retardant properties can be conferred to polymers by using mono-components additives which allow to obtain polymeric compositions free of ammonium or amine phosphates and/or phosphonates, or excellent flame-retardant properties by using, with the above additives, a much lower quantity of ammonium or amine phosphates and/or phosphonates than that used in traditional methods.

DESCRIPTION OF THE INVENTION

The Applicant has also discovered that these excellent results can be obtained by using phosphorus-nitrogen containing products having a simple structure, based on polycondensates of 2,4,6-triamino-1,3,5-triazine salified with a phosphorus containing acid. The new additives, moreover, show good stability to heat, thus maintaining a high flame-retardant activity even when the polymeric compositions in which they are contained are processed under heat.

As said before, saline derivatives of 2,4,6-triamino-1,3,5-triazine (melamine) containing phosphorus, are known (published patent application WO 85/05626) which can be used as co-additives for self-extinguishing compositions in various polymeric matrices, particularly polyolefines. These compounds, such as the melamine phosphate and melamine pyrophosphate, in order to act as flame-retarardant agents, need the presence of other additives, mainly of a compound containing carbon which is necessary for forming an insulating char layer, such as a polyol (pentaerythritol, dipentaerythritol, tripentaerythritol).

On the contrary, the compounds of the present invention are used in formulations of polymeric materials as intumescent char-forming flame-retardant additives without the help of other components.

The polymeric compositions containing the phosphorus-nitrogen products of the present invention,

also have the advantage of emitting a very moderate and not darkening smoke emission in the event of fire.

The present invention consequently concerns salts having the general formula (I): ##STR2## where:

the radicals from R to R₃, either alike or different, and which can also have different meanings for each triazine ring, are: H; C₁ -C₁₈ alkyl; C₂ -C₈ alkenyl; C₆ -C₁₆ cycloalkyl or alkylcycloalkyl, possibly substituted with an oxydrilic (i.e., a hydroxyl group) or C₁ -C₄ hydroxy alkyl function; on the condition that the bivalent or polyvalent radicals, defined below, do not belong to the general formulas (III) and (XII) respectively, and the radicals R₅ and R₆, defined below, are different from H and OH respectively; ##STR3## with:

m=integer comprised between 2 and 8, preferably between 2 and 4;

p=integer comprised between 2 and 6;

R₇ =H; C₁ -C₈ alkyl, preferably H or C₁ -C₄ alkyl; C₂ -C₆ alkenyl;

--[--C_(q) H_(2q) --]--O--R₉ where q is an integer comprised between 1 and 4 and R₉ is H or C₁ -C₄ alkyl; C₆ -C₁₂ cycloalkyl or alkyl-cycloalkyl; the R₈ radicals, either alike or different, are: H; C₁ -C₈ alkyl; C₂ -C₆ alkenyl; C₆ -C₁₂ cycloalkyl or alkylcycloalkyl; C₁ -C₄ hydroxyalkyl; on the condition that the bivalent or polyvalent radical, defined below, do not belong to the general formulas (III) and (XII) respectively, and the radicals R₅ and R₆, defined below, are different from H and OH respectively; or the group: ##STR4## is replaced by an heterocyclic radical linked to the alkyl chain by the nitrogen atom and optionally containing another hereto atom preferably chosen from O, S, N;

or in the general formula (I) at least one of the groups: ##STR5## is replaced by a heterocyclic radical linked to the triazine chain by the nitrogen atom and optionally containing another hereto atom chosen preferably from O, S, N;

a is 0 or 1

b is 0 or an integer comprising between 1 and 5;

R₄ is hydrogen or: ##STR6## and its meaning can vary within each repetition unit; when b is 0, Z is a bivalent radical included in one of the following formulae: ##STR7## where the R₁₀ radicals, either alike or different, are hydrogen or C₁ -C₄ alkyl; ##STR8## where r is an integer comprised between 2 and 14; R₁₁ is hydrogen; C₁ -C₄ alkyl; C₂ -C₆ alkenyl; C₁ -C₄ hydroxyalkyl; ##STR9## where s is an integer comprised between 2 and 5 and t is an integer comprised between 1 and 3; ##STR10## where:

X is a C--C bond; O; S; S--S; SO; SO₂ ; NH; NHSO₂ ; NHCO; N═N; CH₂ ;

R₁₂ is hydrogen; hydroxy radical; C₁ -C₄ alkyl; C₁ -C₄ alcoxyle; ##STR11## where A can be a saturated or unsaturated cycle; ##STR12## where s has the previously defined meaning;

when b is an integer comprised between 1 and 5 the group: ##STR13## is a polyvalent radical included in one of the following formulae: ##STR14## where

R₁₃ is hydrogen or C₁ -C₄ alkyl;

c is an integer comprised between 1 and 5;

indexes s, either alike or different, have the above defined meaning; ##STR15## where:

R₁₃ has the previously defined meaning;

w is an integer comprised between 2 and 4;

d is either 1 or 2;

n is a number from 0 to 3, particularly from 0.2 to 2.5;

R₅ is H, OH, --O--C₁ -C₈ alkyl; --O--C₆ -C₁₂ aryl, optionally substituted with a C₁ -C₈ alkyl; C₇ -C₁₂ aralkyl, optionally substituted with a C₁ -C₄ alkyl; C₁ -C₄ alkyl,optionally substituted with a carboxylic group; C₆ -C₁₂ aryl;

R₆ is H, OH, --O--C₁ -C₈ alkyl; --O--C₆ --C₁₂ aryl; C₁ -C₄ alkyl; C₆ -C₁₂ aryl;

R₆ also is: ##STR16## where:

R₁₄ is H or C₁ -C₁₂ alkyl;

Y is OH or R₁₄ ; ##STR17## where

R₁₄ has the previously defined meaning, and the R₁₅ radicals, either alike or different, are H or C₁ -C₄ alkyl;

or the group: ##STR18## is replaced by a heterocyclic radical linked to the carbon atom by the nitrogen atom and optionally containing another heteroatom chosen preferably among O, S, N; ##STR19## where:

R₁₆ is H or C₁ -C₈ alkyl; and t has the previously defined meaning; ##STR20## where:

R₁₇ is H or OH; ##STR21## where:

p has the previously defined meaning; or

R₅ and R₆ together may form a cyclic structure having formula: ##STR22##

Also the compounds having asymmetrical structure, in the sense that any radical from R to R₃ may have different meanings on any triazine ring, belong to the general formula (I).

Examples of radicals from R to R₃ in formula (I) are: methyl, ethyl; propyl; isopropyl; n-butyl; isobutyl; tert-butyl; n-pentyl; isopentyl; n-hexyl; tert-hexyl; octyl; tert-octyl; decyl; dodecyl; octadecyl; ethenyl; propenyl; butenyl; isobutenyl; hexenyl; octenyl; cyclohexyl; propylcyclohexyl; butylcyclohexyl; decylcyclohexyl; hydroxycyclohexyl; hydroxyethylcyclohexyl; 2-hydroxyethyl; 2-hydroxypropyl; 3-hydroxypropyl; 3-hydroxybutyl; 4-hydroxybutyl; 3-hydroxypentyl; 5-hydroxypentyl; 6-hydroxyhexyl; 3-hydroxy-2,5-dimethylhexyl; 7-hydroxyheptyl; 7-hydroxyoctyl; 2-methoxyethyl; 2-methoxypropyl; 3-methoxypropyl; 4-methoxybutyl; 6-methoxyhexyl; 7-methoxyheptyl; 7-methoxyoctyl; 2-ethoxyhethyl; 3-ethoxypropyl; 4-ethoxybuthyl; 3-propoxypropyl; 3-butoxypropyl; 4-butoxybuthyl; 4-isobutoxybuthyl; 5-propoxypentyl; 2-cyclohexyloxyethyl; 2-ethenyloxyethyl; 2-(N,N-dimethylamino)ethyl; 3-(N,N-dimethylamino)propyl; 4-(N,N-dimethylamino)buthyl; 5-(N,N-dimethylamino)pentyl; 4-(N,N-diethylamino)buthyl; 5-(N,N-diethylamino)pentyl; 5-(N,N-diisopropylamino)pentyl; 3-(N-ethylamino)propyl; 4-(N-methylamino)buthyl; 4-(N,N-dipropylamino)buthyl; 2-(N,N-diisopropylamino)ethyl; 6-(N-hexenylamino)hexyl; 2-(N-ethenylamino)ethyl; 2-(N-cyclohexylamino)ethyl; 2-(N-2-hydroxyethylamino)ethyl 2-(2-hydroxyethoxy)ethyl; 2-(2-methoxyethoxy)ethyl; 6-(N-propylamino)hexyl; etc.

Examples of heterocyclic radicals which can replace the groups: ##STR23## are: aziridine; pyrrolidine; piperidine; morpholine; thiomorpholine; piperazine; 4-methylpiperazine; 4-ethylpiperazine; 2-methylpiperazine; 2,5-dimethylpiperazine; 2,3,5,6-tetramethylpiperazine; 2,5,5-tetramethylpiperazine, 2-ethylpiperazine; 2,5-diethylpiperazine; etc..

Examples of heterocyclic radicals which can replace the group: ##STR24## are: aziridine; pyrrolidine; piperidine; morpholine; thiomorpholine; piperazine; 4-methylpiperazine; 4-ethylpiperazine; etc..

Examples of divalent --Z-- radicals are those obtained from the following diamino compounds by eliminating one hydrogen atom from any amino group: piperazine; 2-methylpiperazine; 2,5-dimethylpiperazine; 2,3,5,6-tetramethylpiperazine; 2-ethylpiperazine; 2,5-diethylpiperazine; 1,2-diaminoethane; 1,3-diaminopropane; 1,4-diaminobutane; 1,5-diaminopentane; 1,6-diaminohexane; 1,8-diaminooctane; 1,10-diaminodecane; 1,12-diaminododecane; N,N'-dimethyl-1,2-diaminoethane; N-methyl-1,3-diaminopropane; N-ethyl-1,2-diaminoethane; N-isopropyl-1,2-diaminoethane; N-(2-hydroxyethyl)-1,2-diaminoethane; N,N'-bis(2-hydroxyethyl)-1,2-diaminoethane; N-(2-hydroxyethyl)-1,3-diaminopropane; N-hexenyl-1,6-diaminohexane; N,N'-diethyl-1,4-diamino-2-butene; 2,5-diamino-3-hexene; 2-aminoethylether; (2-aminoethoxy)methylether, 1,2-bis(2-aminoethoxy)ethane; 1,3-diaminobenzene; 1,4-diaminobenzene; 2,4diaminotoluene; 2,4-diaminoanisole; 2,4-diaminophenol; 4-aminophenylether; 4,4'-methylenedianiline, 4,4'-diaminobenzanilide; 3-aminophenylsulfone, 4-aminophenylsulfone; 4-aminophenylsulfoxide, 4-aminophenyldisulfide; 1,3-bis(aminomethyl)benzene; 1,4-bis(aminomethyl)benzene; 1,3-bis(aminomethyl)cyclohexane; 1,8-diamino-p-menthane; 1,4-bis(2-aminoethyl)piperazine; 1,4-bis(3-aminopropyl)piperazine; 1,4-bis(4-aminobuthyl)piperazine; 1,4-bis(5-aminopentyl)piperazine; etc..

Examples of polyvalent radicals: ##STR25## are those obtained from the following polyamino compounds by eliminating one hydrogen atom from any reacted amino group: bis(2-aminoethyl)amine; bis(3-aminopropyl)amine; bis(4-aminobuthyl)amine; bis(5-aminopentyl)amine; bis[2-(N-methylamino)ethyl]amine; 2-N-buthyl bis(2-aminoethyl)amine; bis[3-(N-methylamino)propyl]amine; N-(3-aminopropyl)-1,4-diaminobutane; N-(3-aminopropyl)-1,5-diaminopentane; N-(4-aminobuthyl)-1,5-diaminopentane; tris(2-aminoethyl)amine; tris(3-aminopropyl)amine; tris(4-aminobuthyl)amine; tris[2-(N-ethylamino)ethyl]amine; N,N'-bis(2-aminoethyl)-1,2-diaminoethane; N-N'-bis(3-aminopropyl)-1,3-diaminopropane; N,N'-bis(2-aminoethyl)-1,3-diaminopropane; N-N'-bis(3-aminopropyl)-1,2-diaminoethane; N,N'-bis(3-aminopropyl)-1,4-diaminobutane; bis[2-(2-aminoethyl)aminoethyl]amine; N,N'-bis[2-(2-aminoethyl)aminoethyl]-1,2-diaminoethane; N,N'-bis[3-(2-aminoethyl)aminopropyl]-1,2-diaminoethane; N,N,N',N'-tetrakis(2-aminoethyl)-1,2-diaminoethane; etc..

Examples of phosphorus containing acids are: hypophosphorous acid; phosphorous acid; phosphoric acid; pyrophosphoric acid; tripolyphosphoric acid; ethane-1,1,2-triphosphonic acid; 2-hydroxyethane-1,1,2-triphosphonic acid; propane-1,2,3-triphosphonic acid; isopropylphosphoric acid; n-buthylphosphoric acid; di-isopropylphosphoric acid; d-n-butyl phosphoric acid; di-n-pentylphosphoric acid; isooctylphosphoric acid; hexylphosphoric acid; 2-ethylhexylphosphoric acid; methylphosphonic acid; ethylphosphonic acid; n-propylphosphonic acid; n-buthylphosphonic acid; aminomethylphosphonic acid; phenylphosphoric acid; phenylphosphonic acid; phenylphosphinic acid; di-n-buthylpyrophosphoric acid; di(2-ethylhexyl)pyrophosphoric acid; octylphenylphosphoric acid; 2-methylbenzylphosphonic acid; 1-aminoethane-1,1-diphosphonic acid; 1-hydroxyethane-1,1-diphosphonic acid; 1-hydroxydodecane-1,1-diphosphonic acid; 1-(N-methylamino)ethane-1,1-diphosphonic acid; N,N-dimethylaminomethane-1,1-diphosphonic acid N-buthylaminomethane-1,1-diphosphonic acid; phosphonacetic acid; 2-phosphonopropionic acid; 3-phosphonopropionic acid; 2-phosphonobutyric acid; 4-phosphonobutyric acid; 2-hydroxy-5,5-dimethyl-2-oxo-1,3,2-dioxophosphorinane; 3,9-dihydroxy-2,4,8,10-tetraoxo-3,9diphosphaspyro[5,5]undecano-3,9-dioxyde; aminotris(methylenphosphonic) acid; ethylendiaminotetra(methylenphosphonic) acid; examethylendiaminotetra(methylenphosphonic) acid; diethylentriaminopenta(methylenphosphonic) acid; etc.

Specific compounds included in the formula (I) are indicated in the examples which follow.

The products having the general formula (I) can be synthesized by reacting n moles of a polycondensate of 2,4,6-triamino-1,3,5-triazine, having the general formula (XIV): ##STR26## where n and the substituents from R to R₃, R₄ and the radical: ##STR27## have the previously defined meaning, with one mole of an acid containing phosphorous of general formula (XV): ##STR28## where R₅ and R₆ have the previously defined meaning, in the presence of a suitable solvent (for example water, methyl alcohol, ethyl alcohol, acetonitrile, etc.) at a temperature comprised between 0° C. and the boiling point of the solvent used, or without any solvent and with an excess of acid containing phosphorous, if the latter is able to act as a solvent, at a temperature comprised between 0° and 150° C.

The saline product obtained can be easily separated from the raction mass either by filtration or by distillation of the solvent.

Good quality products of general formula (I) are generally obtained in white, crystalline powder form, which can be used in self-extinguishing polymeric compositions without further purification.

Some of the intermediate products of general formula (XIV) are known; however, they can be easily synthesized according to the general method outlined herebelow: ##STR29## or as described in Italian patent applications n. 21562 A/89 of 28.08.89 and n. 18839 A/90 of 27.03.90, filed by the Applicant.

The acids containing phosphorus of general formula (XV) are also known and many of them are available in commercial amounts.

The present invention, moreover, concerns self-extinguishing polymeric compositions including:

a) from 90 to 40 parts by weight of a thermoplastic polymer or a polymer having elastomeric properties;

b) from 10 to 60 parts by weight, preferably from 12 to 40, of one or more polycondensate compounds of 2,4,6-triamino-1,3,5-triazine salified with an oxygenated acid of phosphorus, said derivatives of 2,4,6-triamino-1,3,5-triazine having the general formula (XIV): ##STR30## where:

the substituents from R to R₃, R₄ and the radical: ##STR31## have the previously defined meaning.

The component (b) is preferably chosen among the salts having the general formula (I): ##STR32## where:

n and the radicals from R to R₆ and the substituent: ##STR33## have the previously defined meaning.

It is particularly preferable to use the salts of compounds having the general formula (I) in which one or two of the groups: ##STR34## are substituted by a NH₂ radical.

If we want to further increase the self-extinguishing properties of polymeric compositions of the present invention, from 1 to 25 parts by weight of one or more ammonium and/or amine phosphates and/or phosphonates may be added to them, in place of an equal number of parts by weight of component (b).

Among the phosphates which can be used in addition to component (b) it is preferable to use ammonium polyphosphates which are included in the products of general formula (NH₄)_(n+2) P_(n) O_(3n+1) where n represents an integer equal or higher than 2; the molecular weight of the polyphosphates should preferably be sufficiently high as to guarantee a low solubility in water, i.e. n should preferably vary between 2 and 500.

The composition of polyphosphates having the above-mentioned formula, where n is a sufficiently high number, preferably between 5 and 500, practically corresponds to the formula of methaphosphates (NH₄ PO₃)_(n).

An example of these polyphosphates is that known under the trade name of "Exolit 422" (produced and sold by Hoechst), having the composition (NH₄ PO₃)_(n) where n is higher than 50; another example is the product known under the trade-name "Phos-Chek P/30" (Monsanto Chemical) having similar composition.

Another polyphosphate which can be advantageously used, especially because of its low solubility in water, is that known under the trade name of "Exolit 462" (produced and sold by Hoechst) corresponding to Exolit 422 micro incapsulated in melamine-formaldehyde resin.

Other phosphates which can be used are those deriving from amines, for example dimethylammonium or diethylammonium phosphate, ethylenediamine phosphate, melamine ortho or pyrophosphate.

Among the polymers which can be used in the compositions of the present invention, polymers or copolymers of olefines having the general formula R--CH═CH₂ are preferred, where R is a hydrogen atom or a C₁ -C₈ alkyl or aryl radical, in particular:

1. isotactic, or prevailingly isotatic polypropylene;

2. HDPE, LLDPE and LDPE;

3. crystalline copolymers of propylene with lower proportions of ethylene and/or other alpha-olefins, such as 1-butene, 1-hexene, 1-octene, 4-methyl-1-pentene;

4. heterophasic compositions including (A) a homopolymeric fraction of propylene or one of the copolymers indicated in point (3), and (B) a copolymeric fraction composed of elastomeric copolymers of ethylene with an alpha-olefin, optionally containing lower proportions of a diene, where the alpha-olefin is preferably chosen between propylene and 1-butene;

5. elastomeric copolymers of ethylene with alpha-olefins optionally containing a lower proportion of a diene.

Examples of diene compounds which are most commonly present in the above elastomeric copolymers, are butadiene, ethylidene-norbornene, hexadiene 1-4.

Among the polymers of olefins having the formula R--CH═CH₂ where R is an aryl radical, crystal and shock-resistant polystyrene are preferred.

Other examples of polymers commonly used are ABS terpolymers and SAN copolymers; polyurethane (polyester and polyether); polyethyleneterephthalate; polybutyleneterephthalate; polyamides; etc.

The self-extinguishing compositions of the present invention can be prepared using known methods: for example, the ammonium and/or amine phosphate, if used, is first carefully mixed with one or more salts of the general formula (I), finely ground, (preferably with particle size lower than 70 microns) and the mixture thus obtained is then added to the polymer in a turbo mixer forming a homogeneous mixture which is extruded and granulated. The granular product thus obtained can be transformed into various manufactures using one of the well-known molding techniques.

The flame-resistant additives of the present invention are also suitable for use in the field of antifire paints.

EXAMPLES

The following examples illustrate the characteristics of the invention without limiting them in any way.

The salification reactions between the intermediate products having the general formula (XIV) and the acids containing phosphorous having the general formula (XV) are confirmed by the IR spectroscopy analysis using a Perkin Elmer 580 B IR spectrophotometer.

It was observed, in fact, that an excellent reference signal is given by the peak caused by the deformation outside the triazine ring plane: the triazine ring gives a peak at approximately 830-800 cm⁻¹, whereas when the ring is salified on the amino-groups, the peak moves to 795-760 cm⁻¹.

Example 1

184.5 g of cyanuric acid chloride and 1300 ml of methylene chloride are charged into a 3 liters reactor equipped with an agitator, thermometer, loading funnel, reflux condensing system and cooling bath.

At the same time, 75 g of 2-methoxyethylamine and 40 g of sodium hydrate dissolved in 150 ml of water are charged, during an external cooling, for a period of 3 hours, the pH being maintained at between 5 and 7 and the temperature between 0° and 3° C.

The whole mixture is kept at a temperature of 0°-3° C. for a further 3 hours and then the water phase is separated.

The organic solution is treated with two quantities of 200 ml each of water, and the water phase is separated each time.

217.5 g of the intermediate product (XVI): ##STR35## are obtained by the distillation of the methyl chloride, as white, crystalline powder having m.p.=73°-75° C. (m.p.=melting point) and chlorine content equal to 31.68% (theoretical value: 31.84%).

400 ml of acetone and 133.8 g of the intermediate product (XVI) are charged into a 1 liter reactor equipped with an agitator, thermometer, loading funnel, reflux condenser and heating bath.

The mixture is stirred and heated to 40° C. until a solution is obtained, 102 g of a solution of ammonia at a concentration of 30% by weight, are then added over a period of 30 minutes during which the temperature is kept at 40° C.

The temperature is then raised to 45° C. and kept as such for 4 hours.

After it has been cooled to 10° C. the resulting cake is filtered and washed on the filter with cold water.

After drying in an oven at l00° C., 114 g of the intermediate product (XVII): ##STR36## are obtained as a white crystalline powder having a m.p.=195°-197° C. and chlorine content equal to 17.18% (theoretical 17.44%).

The structure of the intermediate products (XVI) and (XVII) was confermed by IR spectroscopic analysis.

500 ml of xylene, 81.4 g of the intermediate product (XVII) and 17.2 g of piperazine are charged into the same 1 liter reactor.

The mixture is heated to 100° C. and this temperature is maintained for 2 hours.

16 g of sodium hydrate are then charged and the mixture is brought to the boiling temperature- It is kept under reflux for approx. 20 hours, then is cooled to room temperature and filtered.

The cake is washed adequately with water and dried.

74.2 g of the intermediate product (XVIII): ##STR37## are obtained, having a m.p=212°-215° C.

63 g of the intermediate product (XVIII), plus 400 ml of acetonitrile and, under agitation, 34.6 g of a 85% by weight phosphoric acid are charged into the same 1 liter reactor.

The above mixture is heated to the boiling temperature and is kept under reflux for 8 hours.

After cooling to room temperature, the resulting cake is filtered and washed on the filter with acetonitrile.

After the cake has been dried in an oven at 100° C., 89.2 g of product: ##STR38## are obtained as a white crystalline powder having a m.p.=265°-268° C. and phosphorus content of 9.97% (theoretical: 10.06%).

Example 2

184.5 g of cyanuric acid chloride and 1300 ml of methylene chloride are charged into the same 3 liters reactor of example 1.

With the same procedure as in example 1, but using 87.2 g of morpholine, 230 g of the intermediate product (XIX): ##STR39## are obtained as a white, crystalline powder having a m.p.=155°-157° C. and a chlorine content of 29.87% (theoretical: 30.21%).

100 g of a 30% by weight solution of ammonia, 100 ml of water and 70.5 g of the intermediate product (XIX) are charged into a 0.5 liter reactor, equipped as in example 1.

The above mixture is heated to 50° C. and kept at this temperature for 7 hours. It is left to cool to room temperature and the resulting product is filtered and washed with water.

Upon drying of the compound, 58 g of the intermediate product (XX): ##STR40## are obtained as a white, crystalline powder having a m.p.=189°-191° C. and a chlorine content of 16.28% (theoretical=16.47%).

The structure of the compounds (XIX) and (XX) was confirmed by IR spectroscopic analysis.

400 ml of ortho-dichlorobenzene, 53.9 g of intermediate product (XX) and 14.5 g of hexamethylenediamine are charged into a 1 liter reactor equipped as above described.

The mixture is heated to 100° C. and kept at this temperature for 2 hours. 10 g of sodium hydrate are then added and the mixture is heated to 140° C. It is kept at this temperature for 16 hours, then is cooled to room temperature and the resulting product is filtered and washed thoroughly with water.

After drying, 62.3 g of the intermediate product (XXI): ##STR41## are obtained as a white, crystalline powder having a m.p.=267°-269° C.

300 ml of acetonitrile, 47.4 g of the intermediate product (XXI) and, under agitation, 24.2 g of a 85% by weight phosphoric acid are charged into a 0.5 liter reactor equipped as the above.

The mixture is heated to the boiling temperature and is kept under reflux for 12 hours.

After cooling to room temperature the resulting product is filtered and washed on the filter with acetonitrile.

After drying, 65.8 g of the product: ##STR42## are obtained, as a white, crystalline powder having a m.p.=265°-268° C. and phosphorus content of 9.18% (theoretical: 9.25%).

Example 3

184.5 g of cyanuric acid chloride and 800 ml of acetone are charged into a 3 liter reactor equipped with an agitator, thermometer, loading funnel, reflux condenser and heating bath.

The mixture is heated under agitation to 40° C. until a solution is obtained, and 284 g of a 30% by weight solution of ammonia are then added over a period of 30 minutes during which the temperature is maintained at 40° C.

It is then further heated to 45° C. and kept at this temperature for 4 hours.

After cooling, the resulting product is filtered and washed on the filter with water.

After drying under vacuum, in an oven at 50°-60° C., 113 g of the intermediate product (XXII): ##STR43## are obtained as a white, crystalline powder, having a m.p. higher than 300° C. and a chlorine content of 24.2% (theoretical: 24.4%).

The structure of the compound was confirmed by IR spectroscopic analysis.

400 ml of xylene, 58.2 g of the intermediate product (XXII) and 17.2 g of piperazine are charged into a 1 liter reactor equipped as above.

The mixture is heated to 100° C. and kept at this temperature for 2 hours.

16 g of solid sodium hydrate are then charged and the mixture brought to boiling temperature.

It is kept under reflux for about 20 hours, then cooled to room temperature and filtered.

The cake is washed thoroughly with water and dried. 54.2 g of the intermediate product (XXIII): ##STR44## are obtained as a white, crystalline powder having a m.p. higher than 300° C.

328 g of phosphorous acid and 82 g of acetonitrile are charged into a 1 liter reactor equipped as above.

The reaction mixture is slowly heated over a period of 6 hours to 160° C.

A white, crystalline powder is obtained.

It is then cooled to 80° C., 500 ml of water are added under strong agitation and the whole mixture is left to cool to room temperature.

The resulting product is separated by filtration and washed on the filter with a small amount of water.

After the cake has been dried, 290 g of 1-aminoethane-1,1-diphosphonic acid are obtained as a white, crystalline powder having a m.p.=265°-270° C. (with decomposition) and a phosphorus content of 29.4% (theoretical: 30.24%).

600 ml of water and 45.6 g of the intermediate product (XXIII) are charged into the same 1 liter reactor.

The mixture is heated to 80° C. and 61.6 g of 1-aminoethane-1,1-diphosphonic acid are charged under agitation.

It is brought to the boiling temperature and is maintained under reflux for approx. 8 hours.

It is then cooled to room temperature and the resulting product is filtered and washed on the filter with water.

After drying the cake, 102.5 g of the product: ##STR45## are obtained as a white, crystalline powder having a m.p.=273°-275° C. and a phosphorus content of 16.97% (theoretical: 17.36%).

Example 4

600 ml of xylene, 107.8 g of the intermediate product (XX) and 15 g of ethylenediamine are charged into a 1 liter reactor equipped as in example 2.

With the same procedure as described in example 2, 99.6 g of the intermediate product (XXIV): ##STR46## are obtained as a white, crystalline powder having a m.p.=265°-268° C.

53.2 g of tetrasodium pyrophosphate and 400 ml of water are charged into the same 1 liter reactor, equipped with a cooling bath.

The mixture is cooled from the outside to 5° C. and 78.7 g of hydrochloric acid (37% by weight) are then added and a solution is obtained.

83.6 g of the intermediate product (XXIV) are added to this solution at a constant temperature of 5° C.

The above solution is then kept under agitation for 2 hours at the temperature of 5° C., is then left to reach room temperature and is kept under agitation for a further 3 hours.

It is again cooled to 2°-5° C. and the resulting product separated by filtration and washed on the filter with cold water.

After drying the cake, 108.1 g of the product: ##STR47## are obtained as a white, crystalline powder having a m.p.=277°-282° C. and phosphorus content of 9.97% (theoretical: 10.40%).

Example 5

400 ml of xylene, 64.7 g of the intermediate product (XX) and 10.3 g of diethylenetriamine are charged into 1 liter reactor equipped as in the preceding examples.

The mixture is heated to 100° C. and kept at this temperature for 2 hours. 12 g of sodium hydrate are then added and the whole mixture is brought to boiling temperature.

The mass is maintained under reflux for 24 hours, is then cooled to room temperature and the resulting product is filtered and the cake is washed thoroughly with water.

After drying in an oven at 100° C., 545.7 g of the intermediate product (XXV): ##STR48## are obtained as a white, crystalline powder having a m.p.=207°-208° C.

150 ml of acetonitrile, 32.0 g of the intermediate product (XXV) and, under agitation, 18.2 g of phosphoric acid (85% by weight) are charged into a 0.5 liter reactor equipped as the above.

The mass is heated to boiling temperature and is maintained under reflux for 16 hours.

After cooling to room temperature,the resulting product is filtered and washed on the filter with acetonitrile.

After the cake is dried, 46.4 g of the product: ##STR49## are obtained as a white, crystalline powder having a m.p.=99°-101° C. and phosphorus content of 9.77% (theoretical: 9.96%).

Example 6

129 g of cyanuric acid chloride and 100 ml of methylene chloride are charged into a 2 liters reactor equipped as in the previous examples.

40 g of 3-amino-1-propene dissolved in 150 g of water are added to the solution kept at 0°-2° C. with external cooling, over a period of 90 minutes.

At a constant temperature of 0°-2° C. 28 g of sodium hydrate in 100 ml of water are added over a period of 2 hours. The solution is left under agitation for a further 2 hours at a temperature of 3°-5° C. and the water phase is then separated:

By distillation of the methylene chloride, 137 g of the intermediate product (XXVI): ##STR50## are obtained as a white, crystalline powder having a m.p.=70°-72° C. and a chlorine content of 34.37% (theoretical: 34.63%).

200 g of a 30% by weight of ammonia solution and 500 ml of water are charged into the same reactor and relevant equipment as above.

The solution is heated to 40° C. and 123 g of the intermediate product (XXVI) are added over a period of 30 minutes, the temperature being maintained at 40° C.

The temperature is raised to 45° C. and kept as such for approx. 6 hours.

After this period, the solution is cooled to room temperature and the resulting product filtered, washed with water and dried.

104 g of the intermediate product (XXVII): ##STR51## are obtained as a white, crystalline powder having a m.p.=168°-170° C. and chlorine content of 18.82% (theoretical: 19.14%).

The structures of the intermediate products (XXVI) and (XXVII) are confirmed by means of NMR analysis.

450 ml of xylene, 55.7 g of the intermediate product (XXVII) and 17.1 g of 2.5-dimethylpiperazine are charged into a 1 liter reactor equipped as above.

The mass is heated to 100° C. for 2 hours, then 12 g of solid sodium hydrate are added and it brought to boiling temperature.

The mixture is kept under reflux for 18 hours and then the procedure is the same as in the previous examples.

56.3 g of the intermediate product (XXVIII): ##STR52## are obtained as a white, crystalline powder having a m.p.=192°-194° C.

400 ml of acetonitrile, 48.4 g of phosphoric acid (85% by weight) and, under agitation, 82.4 g of the intermediate product (XXVIII) are charged into the same 1 liter reactor.

It is then heated to boiling temperature and is kept under reflux for 10 hours.

The mixture is cooled to room temperature, the product obtained is filtered and is washed on the filter with acetonitrile.

After the cake has been dried 114.2 g of the product: ##STR53## are obtained as a white, crystalline powder having a m.p.=197°-200° C. and phosphorus content of 9.87% (theoretical: 10.20%).

Example 7

92.2 g of cyanuric acid chloride and 300 ml of acetone are charged into a 1 liter reactor equipped as in example 1.

21.5 g of piperazine dissolved in 200 ml of acetone are added to the mixture, over a period of 1 hour, with an external cooling to 0°-5° C.

20 g of sodium hydrate in 100 ml of water are added at the constant temperature of 0°-5° C.

The whole mixture is kept for further 4 hours under agitation at the temperature of 5° C. then 200 ml of cool water are added, the produced precipitate is filtered and is washed on the filter with water.

After drying, 88.7 g of the intermediate product (XXIX): ##STR54## are obtained as a white, crystalline powder having a m.p. higher than 300° C. and chlorine content of 37.4% (theoretical: 37.2%).

The structure of the intermediate product (XXIX) is also confirmed by IR spectroscopic analysis.

400 ml of xylene and 76.4 g of the intermediate product (XXIX) are charged into the same 1 liter reactor equipped with the heating bath.

The mixture is heated to a temperature of 80° C. and then 60 g of 2-methoxyethylamine, followed by 32 g of sodium hydrate in 50 ml of water are added over a period of 4 hours.

The temperature is gradually raised and the water eliminated by means of azeotropic distillation until the boiling point of the solvent is reached.

The mixture is kept under reflux for 8 hours, then is cooled to room temperature, filtered and washed thoroughly with water.

After drying, 93.2 g of the intermediate product (XXX): ##STR55## are obtained as a white, crystalline powder having a m.p.=170°-172° C.

400 ml of ethyl alcohol, 53.6 g of the intermediate product (XXX) and, under agitation, 24.2 g of phosphoric acid (85% by weight) are charged into the same 1 liter reactor.

The mixture is left under agitation at room temperature for approx. 14 hours, the resulting product is then filtered and is washed on the filter with a small amount of solvent.

By drying the cake in an oven at 100° C. 70.9 g of the product: ##STR56## are obtained as a white, crystalline powder having a m.p.=242°-245° C. and a phosphorus content of 8.43% (theoretical: 8.47%).

Example 8

400 ml of acetone, 500 ml of water and 94 g of the intermediate product (XIX) are charged into a 2 liter reactor equipped as in example 1.

The mixture is cooled from the outside to 5°-10° C. and then 49.8 g of 2-hydroxyethylamine are added over a period of 1 hour.

The temperature is raised to room temperature and the mixture left under agitation for 1 hour.

It is then heated to 40° C. and kept at this temperature for 2 hours.

It is again cooled to 10° C., the resulting product is filtered and washed with a small amount of cold water.

After drying the cake, 89.4 g of the intermediate product (XXXI): ##STR57## are obtained as a white, crystalline powder having a m.p.=168°-170° C. and a chlorine content of 13.59% (theoretical: 13.68%).

The structure of the intermediate product (XXXI) is also confirmed by means of NMR analysis.

400 ml of xylene, 77.9 g of the intermediate product (XXXI) and 12.9 g of piperazine are charged into a 1 liter reactor equipped as in the previous examples.

The mixture is heated to 100° C. for 2 hours, 12 g of solid sodium hydrate are then added and the whole mixture is brought to boiling temperature.

It is kept under a reflux for 16 hours, and the same procedure as described in the previous examples is then carried out.

65.4 g of the intermediate product (XXXII): ##STR58## are obtained as a white, crystalline powder having a m.p.=260°-262° C.

400 ml of acetonitrile, 53.2 g of the intermediate product (XXXII) and, under agitation, 16.8 g of phosphorous acid are charged into the same 1 liter reactor.

The mixture is brought to boiling point and kept under reflux for 8 hours.

It is cooled to room temperature, and the resulting product is filtered and washed on the filter with acetonitrile.

By drying the cake in an oven at 100° C. 68.9 g of the product: ##STR59## are obtained as a white, crystalline powder having a m.p.=176°-178° C. and a phosphorus content of 8.84% (theoretical: 8.91%).

Example 9

500 ml of xylene, 86.2 g of the intermediate product (XX) and 15.1 g of tetraethylenepentamine are charged into a 1 liter reactor equipped as in the previous examples.

The mixture is heated to 80° C. and is kept at this temperature for 2 hours.

16 g of sodium hydrate are then added and the temperature is raised to 110° C.

The mixture is kept at 110° C. for 18 hours, is then cooled to room temperature and the resulting product is filtered and washed thoroughly on the filter with water.

By drying the cake in an oven at 100° C. 82.6 g of the intermediate product (XXXIII): ##STR60## are obtained as a white, crystalline powder having a m.p.=178°-183° C.

350 ml of acetonitrile, 54.2 g of the intermediate product (XXXIII) and, under agitation, 20.5 g of phosphorous acid are charged into the same 1 liter reactor.

The mixture is brought to boiling point and kept in a reflux condensing system for approx. 12 hours.

It is cooled to room temperature and the resulting product is filtered and washed on the filter with acetonitrile.

By drying in an oven, 72.7 g of the product: ##STR61## are obtained as a white, crystalline powder having a m.p.=129°-132° C. and a phosphorus content of 10.61% (theoretical: 10.37%).

Example 10

450 ml of water, 91.6 g of the intermediate product (XVII) and, under agitation, 21.9 g of tri(2-aminoethyl)amine are charged into a 1 liter reactor equipped as in the previous examples.

The mixture is heated to 80° C. and kept at this temperature for 3 hours.

18 g of sodium hydrate dissolved in 30 ml of water are then added and the whole mixture is brought to boiling temperature.

It is kept under reflux for 16 hours, then is cooled to 10° C. and the resulting product is filtered and washed on the filter with cold water.

By drying the cake in an oven at 100° C., 85.4 g of the intermediate product (XXXIV): ##STR62## are obtained as a white, crystalline powder having a m.p.=190°-195° C.

400 ml of acetonitrile, 64.7 g of the intermediate product (XXXlV) and, under agitation, 36.3 g of phosphoric acid (85% by weight) are charged into the same 1 liter reactor.

The mixture is heated to boiling temperature and is kept under reflux for approx. 14 hours.

It is cooled to room temperature and the resulting product is filtered and washed on the filter with acetonitrile.

By drying the cake in an even, 82.1 g of the product: ##STR63## are obtained as a white, crystalline powder having a m.p.=107°-111° C. and a phosphorus content of 10.15% (theoretical: 9.88%).

Example 11

400 ml of water, 86.2 g of the intermediate product (XX) and 20.6 g of diethylenetriamine are charged into the same 1 liter reactor with relevant equipment as described in the previous examples.

The mixture is heated to 80° C. for 2 hours, 16 g of sodium hydrate dissolved in 30 ml of water are then added and the whole mixture heated to boiling temperature.

It is kept under reflux for approx. 14 hours and the same procedure as described in the previous example is then carried out. 86.2 g of the intermediate product (XXXV): ##STR64## are obtained as a white, crystalline powder having a m.p.=198°-201° C.

450 ml of acetonitrile, 69.1 g of the intermediate product (XXXV) and, under agitation, 36.3 g of phosphoric acid (85% by weight) are charged into the same 1 liter reactor.

The mixture is heated to boiling temperature and kept under reflux for approx. 10 hours.

Using the same procedure as described in the previous example, 95.2 g of the product: ##STR65## are obtained as a white, crystalline powder having a m.p.=120°-124° C. and a phosphorus content of 9.21% (theoretical: 9.44%).

Examples 12-52

The products having general formula (I) shown in Table 1 are synthesized under the same conditions as those described in examples 1-11.

    TABLE 1               n.ex. RNR.sub.1 R.sub.2NR.sub.3       ##STR66##       n       ##STR67##       (°C.)m.p. theoreticalexperimental% phosphorus                   12       ##STR68##       H H H       ##STR69##       0,5 H.sub.3 PO.sub.4 >300 9,34 9,12       13 H H H H      ##STR70##       0,5       ##STR71##       >300 9,75 9,48                 14      ##STR72##       H H       ##STR73##       1 H.sub.3 PO.sub.4 272-277 5,71 5,58       15      ##STR74##       H H       ##STR75##       0,5 H.sub.3 PO.sub.4 270-272 9,67 9,48             16 CH.sub.2 CH.sub.2      OCH.sub.3 H H H       ##STR76##       1       ##STR77##       206-210 9,90 9,57  17 CH.sub.2 CH.sub.2       OCH.sub.3 H H H      ##STR78##       0,5       ##STR79##       235-240 14,92  15,18                 18      ##STR80##       H H       ##STR81##       0,5 H.sub.3 PO.sub.4 260-263 9,75 9,52             19 CH.sub.2 CH.sub.2      OCH.sub.3 CH.sub.2 CH.sub.2       OCH.sub.3 H H      ##STR82##       0,5 H.sub.3 PO.sub.4 155-160 8,79 8,54                 20      ##STR83##        H H       ##STR84##       1       ##STR85##       264-268 9,24 9,02                  21 H H H H      ##STR86##       1       ##STR87##       285-287 12,16  11,78   22 H H H H N(CH.sub.2 CH.sub.2 NH).sub.3  0,33      H.sub.3 PO.sub.4 152-156 12,12  11,94                 23      ##STR88##       H H       ##STR89##         0,33 H.sub.3 PO.sub.3 170-174 6,75 6,91       24      ##STR90##       H H HN(CH.sub.2).sub.6NH 0,5       ##STR91##       215-218 8,18 8,29       25      ##STR92##       H H       ##STR93##       1 H.sub.3 PO.sub.4 194-198 5,54 5,49             26 CH.sub.2 CH.sub.2      CH.sub.2 OC.sub.2       H.sub.5 H H H      ##STR94##       0,5 H.sub.3 PO.sub.4 218-221 7,63 7,91  27 (CH.sub.2).sub.5 OH H H H       ##STR95##       1       ##STR96##       261-265 8,42 8,27  28 (CH.sub.2).sub.3 OCH.sub.3 H (CH.sub.2).sub.3      OCH.sub.3 H       ##STR97##       0,5 H.sub.3 PO.sub.4 174-177 9,60 9,42  29 CH.sub.2 CH.sub.2 OH H      CH.sub.2 CH.sub.2       OH H      ##STR98##       ##STR99##       168-173 7,25 7,14  30 CH.sub.2 CH.sub.2       OCH.sub.3 H H H      ##STR100##        0,33 H.sub.3 PO.sub.4 285-290 10,36  10,11   31 CH.sub.2 CH.sub.2      OCHCH.sub.2 H H H       ##STR101##       1       ##STR102##       278-280 9,97 9,91  32 (CH.sub.2).sub.2 O(CH.sub.2).sub.2 OH H H H       ##STR103##       0,5 H.sub.3 PO.sub.4 177-181 9,17 8,95       33      ##STR104##       H H H       ##STR105##       0,5 H.sub.3 PO.sub.3 201-204 8,59 8,38                 34      ##STR106##       H H HN(CH.sub.2).sub.6NH 0,5 H.sub.3 PO.sub.4 280-284 9,28 9,17          35 CH.sub.2 CH.sub.2       OH H H H      ##STR107##       1       ##STR108##       202-205 9,10 8,79                 36      ##STR109##       H H HN(CH.sub.2 CH.sub.2 O).sub.2CH.sub.2 CH.sub.2 NH 0,5 H.sub.3      PO.sub.4 168-170 8,83 8,56       37      ##STR110##       H H HN(CH.sub.2).sub.6NH 0,5 H.sub.3 PO.sub.3 195-196 9,70 9,62  38       ##STR111##       H H       ##STR112##       1       ##STR113##       164-168 8,79 8,84                  39 H H H H      ##STR114##       1       ##STR115##        81-85 9,54 9,65       40 H H H H      ##STR116##       1       ##STR117##       288-290 12,18  11,96       41 H H H H      ##STR118##       1,5       ##STR119##       291-294 13,02  12,91                 42      ##STR120##       H H HN(CH.sub.2).sub.6NH 1       ##STR121##       267-269 9,13 9,10       43      ##STR122##       H H       ##STR123##       1       ##STR124##       275-280 9,54 8,83       44      ##STR125##       H H       ##STR126##       0,5       ##STR127##       240-243 8,16 8,31                  45 CH.sub.2CHCH.sub.2 H H H      ##STR128##       1 H.sub.3 PO.sub.4 213-215 6,43 6,58       46 H H H H      ##STR129##       2,5       ##STR130##       203-206 11,63  11,50             47 t-C.sub.8       H.sub.17 H      ##STR131##       HN(CH.sub.2).sub.6NH 0,5 H.sub.3 PO.sub.4 214-217 6,95 6,79      48 H H H H       ##STR132##       0,5 H.sub.3 PO.sub.4 283-286 12,40  12,28                 49      ##STR133##       H H HNCH.sub.2 CH.sub.2 NH 0,5 H.sub.3 PO.sub.4 228-230 10,08  10,10      50       ##STR134##       H H       ##STR135##       0,5 H.sub.3 PO.sub.4 188-191 7,42 7,23       51      ##STR136##       H H       ##STR137##       0,5 H.sub.3 PO.sub.4 227-232 8,18 8,39                  52 H H H H      ##STR138##        0,33 H.sub.3 PO.sub.4 232-235 12,84  12,69

TABLES 2 AND 3

The tests shown in the above tables refer to polymeric compositions containing products having general formula (I) prepared according to the previous examples.

Specimens were prepared, having a thickness of approx. 3 mm, by molding mixtures of granular polymer and additives in a MOORE plate press, operating for 7 minutes at a pressure of 40 kg/cm².

The self-extinguishing level was determined on the above specimens by measuring the oxygen index (L.O.I. according to ASTM D-2863/77) in a Stanton Redcroft equipment, and applying the "Vertical Burning Test" which allows to classify the material at three levels 94 V-0, 94 V-1 and 94 V-2 according to UL 94 codes (issued by "Underwriters Laboratories" - USA).

Table 2 shows the values obtained using isotactic polypropylene in flakes having a Melt Flow Index equal to 12 and an insoluble fraction in boiling n-eptane of 96% by weight.

Table 3 shows the values obtained using low density polyethylene in chips having a M.F.I. equal to 7; polystyrene in chips containing 5% by weight of butadiene rubber and having a M.F.I. equal to 9; thermoplastic polyurethane, both polyester (ESTANE 54600® by Goodrich) and polyether (ESTANE 58300® by Goodrich) in chips, having a specific weight equal to 1.19 and 1.10 g/ml respectively; an ethylene-propylene elastomeric copolymer having a 45% by weight content of propylene; an acrylonitrile-butadiene-styrene terpolymer having a specific weight equal to 1.06 g/ml, a M.F.I. equal to 1.6 and containing approx. 40% of acrylonitrile and styrene and 20% of butadiene.

                  TABLE 2                                                          ______________________________________                                         ex-   product  parts by weight  L.O.I.                                         ample example           PP  AO   APP  (ASTM  UL 94                             N.    N.       product  (1) (2)  (1)  D2863) 3 mm                              ______________________________________                                         53     1       13,5     72  1    13,5 33,2   V0                                54     2       34,0     65  1    0    31,0   V0                                55     2       11,5     76  1    11,5 36,3   V0                                56     3       12,0     75  1    12,0 34,1   V0                                57     4       34,0     65  1    0    30,9   V0                                58     5       23,2     70  1     5,8 32,4   V0                                59     6       12,5     74  1    12,5 34,7   V0                                60     7       39,0     60  1    0    30,7   V0                                61     8       21,6     72  1     5,4 33,7   V0                                62     9       35,0     64  1    0    32,1   V0                                63     9       16,0     75  1    8,0  33,9   V0                                64    10       34,0     65  1    0    30,8   V0                                65    11       34,0     65  1    0    31,6   V0                                66    12       13,5     72  1    13,5 34,9   V0                                67    13       35,0     64  1    0    31,8   V0                                68    14       12,0     74  1    13,0 33,2   V0                                69    15       36,0     63  1    0    31,0   V0                                70    16       22,0     66  1    11,0 31,3   V0                                71    17       39,0     60  1    0    29,9   V0                                72    18       15,0     69  1    15,0 32,7   V0                                73    19       18,0     72  1     9,O 33,5   V0                                74    20       23,2     70  1     5,8 31,8   V1                                75    21       12,0     75  1    12,0 32,7   V0                                76    22       12,0     75  1    12,0 33,4   V0                                77    23       34,0     65  1    0    32,4   V0                                78    24       19,0     70  1    10,0 31,5   V0                                79    25       13,0     73  1    13,0 32,8   V0                                80    26       23,2     70  1     5,8 30,7   V1                                81    27       34,0     65  1    0    31,2   V0                                82    28       25,8     70  1     3,2 32,1   V0                                83    29       18,0     72  1     9,0 31,7   V0                                84    30       14,0     75  1    10,0 32,9   V0                                85    31       39,0     60  1    0    30,9   V1                                86    32       36,0     63  1    0    30,1   V0                                87    33       23,2     70  1     5,8 34,2   V0                                88    34       13,0     73  1    13,0 33,4   V0                                89    35       13,5     72  1    13,5 32,6   V0                                90    36       35,0     64  1    0    30,2   V0                                91    37       20,0     70  1     9,0 32,4   V0                                92    38       14,5     71  1    13,5 33,6   V0                                93    39       14,5     70  1    14,5 29,4   V1                                94    40       10,5     78  1    10,5 32,1   V0                                95    41       39,0     60  1    0    30,9   V1                                96    42       35,0     64  1    0    31,8   V0                                97    43       39,0     60  1    0    31,2   V0                                98    43       16,0     75  1     8,0 30,5   V0                                99    44       13,0     73  1    13,0 31,1   V0                                100   45       13,5     72  1    13,5 30,2   V1                                101   46       39,0     60  1    0    32,0   V0                                102   47       14,5     71  1    13,5 32,3   V0                                103   48       12,0     75  1    12,0 32,7   V0                                104   49        9,6     75  1    14,4 35,9   V0                                105   50       12,0     75  1    12,0 36,1   V0                                106   51       20,0     72  1     7,0 32,8   V0                                107   52       13,5     72  1    13,5 32,6   V0                                108    3       16,0     75  1    *8,0 32,5   V0                                109   15       16,0     75  1    *8,0 33,6   VO                                110   42       19,3     70  1    *9,7 37,4   V0                                ______________________________________                                          (1) PP = Polypropylene                                                         APP = ammonium polyphosphate  Exolit 422.sup.R (Hoechst)                       *APP microincapsulated in melamineformaldehyde resin Exolit 462.sup.R          (Hoechst)                                                                      (2) AO = antioxidant.                                                          Mixture consisting of 2 parts of dilauryltiopropyonate and 1 part of tetr      [3(3,5-diterbuthyl-4-hydroxyphenil) propionate] of pentaerythritol.      

                                      TABLE 3                                      __________________________________________________________________________     POLI    PRODUCT                                                                               PARTS BY WEIGHT     L.O.I.                                      ex.                                                                               MERIC                                                                               EXAMPLE              AO APP                                                                               (ASTM-                                                                              UL94                                   n. SUPP.                                                                               N.     POLYMER                                                                               PRODUCT                                                                               (2)                                                                               (1)                                                                               D2863)                                                                              3 mm                                   __________________________________________________________________________     111                                                                               LDPE  2     60     34,7   1   4,3                                                                              28,6 V2                                     112                                                                               (1)   2     67     16,0   1  16,0                                                                              32,6 V0                                     113      3     70     14,5   1  14,5                                                                              32,8 V0                                     114     10     65     20,0   1  14,0                                                                              31,5 V0                                     115     15     66     16,5   1  16,5                                                                              32,8 V0                                     116     19     64     17,5   1  17,5                                                                              33,2 V0                                     117                                                                               HIPS  3     70     15,0   1  14,0                                                                              31,7 V0                                     118                                                                               (1)   5     71     15,0   1  13,0                                                                              32,4 V0                                     119     15     68     15,5   1  15,5                                                                              31,2 V0                                     120                                                                               PP/PE                                                                                2     60     39,0   1  0  28,7 V0                                     121                                                                               (1)   3     72     13,5   1  13,5                                                                              34,3 V0                                     122     30     70     23,2   1   5,8                                                                              31,4 V0                                     123     38     60     39,0   1  0  27,5 V0                                     124                                                                               PU    1     70     29     1  0  31,4 V0                                     125                                                                               ether                                                                                3     70     29     1  0  33,6 V0                                     126                                                                               (1)  23     70     29     1  0  30,7 V0                                     127                                                                               PU    1     70     29,0   1  0  33,7 V0                                     128                                                                               (ester)                                                                              3     70     29,0   1  0  35.2 V0                                     129                                                                               (1)  17     74     25,0   1  0  34,1 V0                                     130     21     70     29,0   1  0  32,2 V0                                     131     22     65     34,0   1  0  34,8 V0                                     132     23     70     29,0   1  0  32,7 V0                                     133     48     70     29,0   1  0  33,2 V0                                     134     50     75     24,0   1  0  35,2 V0                                     135                                                                               ABS   2     70     14,5   1  14,5                                                                              33,2 V0                                     136                                                                               (1)  23     72     13,5   1  13,5                                                                              32,4 V0                                     __________________________________________________________________________      (1) APP = ammonium polyphosphate  Exolit 422.sup.R (Hoechst)                   LDPE = low density polyethylene                                                HIPS = polystyrene with 5% of butadiene rubber                                 PU (ester) = polyurethane polyester                                            PU (ether) = polyurethane polyether                                            PP/PE = propylene/ethylene copolymer                                           ABS = acrylonitrilebutadiene-styrene terpolymer                                AO = antioxydant.                                                              Mixture consisting of 2 parts of dilauryltiopropyonate and 1 part of           tetra[3(3,5-diterbuthyl-4-hydroxyphenil) propionate]of pentaerythritol.  

Example 137 (for comparison)

With the same procedure used in the examples from 53 to 110, but making use of the 2,4,6-triamino-1,3,5-triazine phosphate (1:1) as nitrogen-containing compound, the following composition was prepared:

    ______________________________________                                         Polypropylene       65    parts by weight                                      Antioxydant:        1     part by weight                                       2,4,6-triamino-1,3,5-                                                                              34    parts by weight                                      triazine phosphate (1:1):                                                      ______________________________________                                    

Specimens were prepared using the above composition and self-extinguishing tests carried out on these samples, according to the previously described procedure.

The following results were obtained:

    ______________________________________                                         L.O.I. =        23.5                                                           UL 94 (3 mm) =  class B (the specimen burns).                                  ______________________________________                                    

Example 138 (for comparison)

With the same procedure described in example 137, the following composition was prepared:

    ______________________________________                                         Polypropylene:      73    parts by weight                                      Antioxydant:        1     part by weight                                       Ammonium polyphosphate:                                                                            13    parts by weight                                      2,4,6-triamino-1,3,5-                                                                              13    part by weight                                       triazine phosphate (1:1):                                                      ______________________________________                                    

Specimens were prepared using the above composition and self-extinguishing tests carried out on these samples, according to the previously described procedure.

The following results were obtained:

    ______________________________________                                         L.O.I. =        22.5                                                           UL 94 (3 mm) =  class B (the specimen burns).                                  ______________________________________                                    

Although the invention has been described in conjunction with specific embodiments, it is evident that many alternatives and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, the invention is intended to embrace all of the alternatives and variations that fall within the spirit and scope of the appended claims. The above references are hereby incorporated by reference. 

We claim:
 1. Salts of triazine compounds with oxygenated acids of phosphorus having formula (I) ##STR139## where: the radicals from R to R₃, either alike or different, and which can also have different meanings for each triazine ring, are:H; C₁ -C₁₈ alkyl; C₂ -C₁₆ alkenyl; C₆ -C₁₆ cycloalkyl or C₆ -C₁₆ alkylcycloalkyl, optionally substituted with a hydroxyl or C₁ -C₄ hydroxy alkyl group; ##STR140## where m is an integer between 2 and 8 and R₇ =H; C₁ -C₈ alkyl; C₂ -C₆ alkenyl; [C_(q) H_(2q) ]--O--R₉ where q is an integer between 1 and 4 and R₉ is H or C₁ -C₄ alkyl; C₆ -C₁₂ cycloalkyl or C₆ -C₁₂ alkyl cycloalkyl; ##STR141## where p=an integer between 2 and 6 and the R₈ radicals, either alike or different, are: H; C₁ -C₈ alkyl; C₂ -C₆ alkenyl; C₆ -C₁₂ cycloalkyl or C₆ -C₁₂ alkyl cycloalkyl; C₁ -C₄ hydroxy alkyl; or --NR₈ BR₈ forms a heterocyclic radical selected from the group consisting of aziridine, pyrrolidine, piperidine, morpholine, thiomorpholine, piperazine, 4-methylpiperazine or 4-ethylpiperazine; or at least one of the groups --NRR₁ or NR₂ R₃ in the formula (I) forms a heterocyclic radical selected from the group consisting of aziridine; pyrrolidine; piperidine; morpholine; thiomorpholine; piperazine; 4-methylpiperazine; 4-ethylpiperazine; 2-methylpiperazine; 2,5-dimethylpiperazine; 2,3,5,6-tetramethylpiperazine; 2,2,5,5-tetramethylpiperazine; 2-ethylpiperazine or 2,5-diethylpiperazine; a is 0 or 1 b is 0 or an integer between 1 and 5; R₄ is hydrogen or: ##STR142## and its meaning can vary within each repetition unit; when b is 0, Z is a bivalent radical selected from one of the following formulae: ##STR143## where the R₁₀ radicals, either alike or different, are hydrogen or C₁ -C₄ alkyl: ##STR144## where r is an integer between 2 and 14 and R₁₁ is hydrogen; C₁ -C₄ alkyl; C₂ -C₆ alkenyl; C₁ -C₄ hydroxy alkyl; ##STR145## where s is an integer between 2 and 5 and t is an integer between 1 and 3; ##STR146## where X is a C--C bond; O; S; S--S; SO; SO₂ ; NH; NHSO₂ ; NHCO; N═N; CH₂ ; and R₁₂ is hydrogen; a hydroxy radical; C₁ -C₄ alkyl; or C₁ -C₄ alkoxy; ##STR147## where A can be a saturated or unsaturated cycle; ##STR148## where s has the previously defined meaning; when b is an integer between 1 and 5, the group: ##STR149## is a polyvalent radical selected from one of the following formulae: ##STR150## where: R₁₃ is hydrogen or C₁ -C₄ alkyl; c is an integer between 1 and 5; indexes s, either alike or different, have the above defined meaning; ##STR151## where: R₁₃ has the previously defined meaning; w is an integer between 2 and 4; d is either 1 or 2; n is a number from greater than 0 to 3; R₅ is H, OH, --O--C₁ -C₈ alkyl; --O--C₆ -C₁₂ aryl, optionally substituted with a C₁ -C₈ alkyl; C₇ -C₁₂ aralkyl, optionally substituted with a C₁ -C₄ alkyl; C₁ -C₄ alkyl, optionally substituted with a carboxylic group; C₆ -C₁₂ aryl; R₆ is H, OH, --O--C₁ -C₈ alkyl; --O--C₆ -C₁₂ aryl; C₁ -C₄ alkyl; C₆ -C₁₂ aryl; R₆ is also ##STR152## where: R₁₄ is H or C₁ -C₁₂ alkyl; Y is OH or R₁₄ ; ##STR153## where: R₁₄ has the previously defined meaning, and the R₁₅ radicals, either alike or different, are H or C₁ -C₄ alkyl; ##STR154## where: R₁₆ is H or C₁ -C₈ alkyl; and t has the previously defined meaning; ##STR155## where: R₁₇ is H or OH; ##STR156## where: p has the previously defined meaning; or R₅ and R₆ together may form a cyclic structure having formula: ##STR157## with the proviso that the bivalent or polyvalent radical, defined above, belongs to the formulae (II), (IV)-(XI) and (XIII), and the radicals R₅ and R₆, defined above, are different from H and OH respectively.
 2. Salts of triazine compounds with oxygenated acids of phosphorus according to claim 1, wherein the acid of phosphorus is selected from the group consisting of: hypophosphorous acid; phosphorous acid; phosphoric acid; pyrophosphoric acid; tripolyphosphoric acid; ethane-1,1,2-triphosphonic acid; 2-hydroxyethane-1,1,2-triphosphonic acid; propane-1,2,3-triphosphonic acid; isopropylphosphoric acid; n-buthylphosphoric acid; diisopropylphosphoric acid; d-n-buthylphosphoric acid; di-n-pentylphosphoric acid; isooctylphosphoric acid; hexylphosphoric acid; 2-ethylhexylphosphoric acid; methylphosphonic acid; ethylphosphonic acid; n-propylphosphonic acid; n-buthylphosphonic acid; aminomethylphosphonic acid; phenylphosphoric acid; phenylphosphonic acid; phenylphosphinic acid; di-n-buthylpyrophosphoric acid; di(2-ethylhexyl)pyrophosphoric acid; octylphenylphosphoric acid: 2-methylbenzylphosphonic acid; 1-aminoethane-1,1-diphosphonic acid; 1-hydroxyethane-1,1-diphosphonic acid; 1-hydroxydodecane- 1,1-diphosphonic acid; 1-(N-methylamino)ethane-1,1-diphosphonic acid; N,N-dimethylaminomethane-1,1-diphosphonic acid; N-buthylaminomethane-1,1-diphosphonic acid; phosphonacetic acid; 2-phosphonopropionic acid; 3-phosphonopropionic acid: 2-phosphonobutyric acid; 4-phosphonobutyric acid; 2-hydroxy-5, 5-dimethyl-2-oxo-1,3,2-dioxophosphorinane; 3,9-dihydroxy-2,4,8,10-tetraoxo-3,9-diphosphaspyro[5,5]undecano-3,9-dioxyde; aminotris(methylenphosphonic) acid; ethylendiaminotetra(methylenphosphonic) acid; hexamethylendiaminotetra(methyienphosphonic) acid; or diethylentriaminopenta(methylenphosphonic)acid. 